Where is most anthracite found in the United States?

In the United States, anthracite is found primarily in northeastern Pennsylvania. These deposits represent the only significant source of anthracite in the country, accounting for less than 2 percent of all U.S. coal reserves. While the Appalachian Plateau contains extensive coalfields, the specific concentration of high-quality anthracite is localized within the folded sedimentary rock regions of Pennsylvania.123